I was disgusted by the size of MiniEE (122 sloc, 4.4kb), so I decided a rewrite was in order.

MicroEE is a more satisfying (~50 sloc, ~1200 characters), and passes the same tests as MiniEE (excluding the RegExp support, but including many real-world tests, such as removing a once() callback, and checking for the correct order of once callback removal).